Fano Resonance-Assisted All-Dielectric Array for Enhanced Near-Field Optical Trapping of Nanoparticles

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dc.contributor.authorConteduca, D.
dc.contributor.authorKhan, S.N.
dc.contributor.authorMartínez Ruiz, M.A.
dc.contributor.authorBruce, G.D.
dc.contributor.authorKrauss, T.F.
dc.contributor.authorDholakia, K.
dc.date.issued2023
dc.description.abstractNear-field optics can overcome the diffraction limit by creating strong optical gradients to enable the trapping of nanoparticles. However, it remains challenging to achieve efficient, stable trapping without heating and thermal effects. Dielectric structures have been used to address this issue but usually offer weak trap stiffness. In this work, we exploit the Fano resonance effect in an all-dielectric quadrupole nanostructure to realize a 20- fold enhancement of trap stiffness, compared to the off-resonance case. This enables a high effective trap stiffness of 1.19 fN/nm for 100 nm diameter polystyrene nanoparticles with 4.2 mW/μm2 illumination. Furthermore, we demonstrate the capability of the structure to simultaneously trap two particles at distinct locations within the nanostructure array.
dc.description.statementofresponsibilityDonato Conteduca, Saba N. Khan, Manuel A. Martínez Ruiz, Graham D. Bruce, Thomas F. Krauss, and Kishan Dholakia
dc.identifier.citationACS Photonics, 2023; 10(12):4322-4328
dc.identifier.doi10.1021/acsphotonics.3c01126
dc.identifier.issn2330-4022
dc.identifier.issn2330-4022
dc.identifier.orcidDholakia, K. [0000-0001-6534-9009]
dc.identifier.urihttps://hdl.handle.net/2440/141886
dc.language.isoen
dc.publisherAmerican Chemical Society (ACS)
dc.relation.granthttp://purl.org/au-research/grants/arc/DP220102303
dc.rights© 2023 The Authors. Published by American Chemical Society. This article is licensed under CC-BY 4.0
dc.source.urihttp://dx.doi.org/10.1021/acsphotonics.3c01126
dc.subjectoptical trapping; Fano resonance effect; near-field enhancement; dielectric nanostructure; polystyrene nanoparticles
dc.titleFano Resonance-Assisted All-Dielectric Array for Enhanced Near-Field Optical Trapping of Nanoparticles
dc.typeJournal article
pubs.publication-statusPublished

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